Method of and means for controlling the water circulation in watertube boilers



- F. LOSEL METHOD OF AND MEANS FOR CONTROLLING THE WATER CIRCULATION IN WATER TUBE BOILERS Filed June 5. 1924 Patented Apr. 6,

UNITED STATES PATENT OFFICE- FRANZ L ClSEL, OF BRUNN, CZECHOSLOVAKIA.

METHOD OF AND MEANS FOR CONTROLLING THE WATER CIRCULATION TN WATER TUBE BOILERS.

Application filed J 'une 5,

rangement of the tubes, further bythe path of the the gases and more particularly by the inclination of the water tubes, but as is well known, this is possible only within comparatively narrow limits. For this reason it has already been proposed to control the circulation of the Vater by movablevanes or the like provided within the boiler. But in these attempts it has never been taken'into account that the different temperatures in the various parts of the tubes of the boiler require diiterent and controllable speeds of the water in order that the temperatures and speeds of the water may be in the proper relation.

According to the present nvention diiterent and .variable speeds of the water are positively produced inthe various water tube regions by mechanical water moving means located outside, such impressed speeds corresponding to the difierent temperatures in the water tube regions. Such mechanical water moving means preferably consist of a pump having a plurality of pressure degrees, the successive pressure degree-s being connected with the successivejwat'er tube regions.

The annexeddrawing illustrates by way of example and diagrammatically; an embodiment of my invention.

The top drum K is connected by a pipe a to the intake of a pump P havinga. plurality, say three, pressure degrees or cylq inders 1, 2, 8. v The water tubes TV of the boiler are divided'into three groups, each constitutinga region, by partitions b dividing the water chambers into three compartments c 0 0 which are connected to the cylinders 1, 2, 3 by pipes 65,, (Z (Z, in

such. a manner that the; lowermost group w 'and '10,.

w of water tubes most exposedtofthe fire gases is connected with the last cylinder with the highest degree of pressure, from which the water escapes with the greatest 1924. Serial No. 718,034.

speed. The next group a of watert-ubes 1s connected by the pipe (Z with the medium pressure cylinder 2 and the uppermost group w Of water tubes is connected "with the cylinder 1. of the lowest pressure; Thus the water is forced to flow through'the va-. rious regions or groups of water tubeswith different speeds. i

In order to permit the speed of the water in the various groups or regions to be controlled in accordance with the temperature ofthe fireg'ases -I provide insoine'suitable part or" the furnace a thermometric apps ratus E of any known or'preferred construction which through the medium of a speed controlling apparatus F ofany known or preferable constructionincreases or reduces the speed of the pump P and thereby controls the speed of the waterin the pipes (Z (Z (Z and in corresponding water tubes ll of the boiler in accordance with the temperature of the fire gases in the furnace of the boiler.

It is evident that the temperature of the .fire gases decreases during the How thereof through the diii'erenttuberegions W. The

different temperatures and the temperature changes in the diti'ercnt regions of the boiler tubes are therefore during operation more or less dependent on and defined by the temperature in a suiable part of the furnace where the-thermoinetric device may be provided, because as a result of the increase of the temperature of the tire gases in such part of the furnace the temperature of the fire gases in the different boiler tube regions .to be increased, and decrease of the tire gas temperatures causes the water velocities in. such different tube regions to be decreased.

accordance with changes or temperature in the difi'erent regions of the boilertubes-w fltq-is evident that thermometric means E may be positioned in any suitable or desirable part of the furnace or the fire gas {Such 'changes in water velocities occur in flow therein. For example, such means E may be placed between or behind the boiler tubes. It is also evident that such thermometric means could be positioned either in suitable or desirable parts or regions of the boiler tubes, the simplest arrangement being that in which the thermometric means is located entirely in a suitable part of the furnace.

The invention otters the advantage that owing to the circulation of water at different speeds in difterent regions, positively produced by external means, any unequal expansions of the various regions by heat are avoided in the regular operation of the boiler as well as in steaming up. Such unequal expansions would occur if the water circulationwere uniform in all regions of the boiler tubes or were caused by the temperatures of the water alone.

What I claim is:

1. The method of controlling the water circulation in water tube boilers consisting in supplying water and in positively producing in various separate regions of the water tubes unequal and variable speeds of water which correspond to the different temperatures existing in the said regions.

2. In con'ibination with a water tube boilor mechanical means for imparting motion to water, comprising an intake connected with a water space of the boiler, a pinality of escape openings connected with different regions of the water tubes of the boiler, and means for causing Water drawn through said intake to pass through the different escape openings at diiterent .peeds to cause different velocities in different regions of the water tubes of the boiler in accordance with the different temperatures in said regions connected todifi'erent regions the water tubes of the boiler in which the temperatures are different, to cause corresponding different water velocities in the tubes of said different regions.

In combination with a water tube boilera pump for imparting motion to water, such pump comprising an intake connected to a water space of the boiler and aplurality of escape openings at points of different pressures connected to different regions of the water tubes of the boiler, in which the temperatures are different, to cause corresponding difierent water velocities in the tubes of said different regions. andmeans for operating the pump.

4. In combination with a water tube boiler a pump adapted to increase the pressure of water successively to a plurality of degrees, such pump comprising an intake'connected to a Water space of the boiler and a plurality of escape openings at di-iferent pressure points for water under different degrees'of pressure, means for connecting such openings to different regions of the water tubes, in which the temperatures are different, to cause corresponding difi erent water velocities in the tubes of said different regions, and means for controlling the pump,

5. In combination with a water tube boiler having. the .watertubes thereof divided into groups, a pump comprising a plurality of stages adapted to increase the pressurecflwater successively to diii'erent degrees of pressure, such pump comprising an intake connected to a water space of the,

boiler and escape openings for the individual stages, such escape openings being connected each to one of said groups of water tubes, in which the temperatures are difi erent, to cause corresponding different water velocities in the tubes of said dillerent groups, and means for operating the pump.

6. In combination with a water tube boiler a pump for imparting motion to water, such pump comprising intake connected to a water space of the boiler and a pluality of escape openings at diiiereut pressure points connected to different regions of the water tubes of the boiler, in which the temperatures are diil'erent to cause dil terent water velocities in the tubes oi said dilieront regions, a driving gear for operating the pump and means responding to the ten'iperature of a heating medium for controlling the speed of said pump.

7. The method of controlling the water circulation in water tube boilers consisting in supplying water and in forcing the water through various separate regions of the water tubes at difierent pressures to produce unequal and variable speeds of water to correspond to the diilercnt temperatures existing in said regions.

8. The method of controlling the water circulation in water tube boilers consisting in taking water from a part of the boiler and in increasingthc pressure of the water in stages and forcing the water at the pressures of said stages through various separate regions of the water tubes to produce unequaland variable speeds of water to correspond with the different temperatures existing in said regions.

9. The method or controlling the water circulation in water tube boilers consisting in supplying water and in forcing the Water through various separate regions of the water tubes, in which the temperatures are different, with velocities corresponding with the different temperatures and in controlling the water velocities through the different regions of the water tubes in accordance with the temperature of the fire gases in a suitable part of the furnace.

10. The method of controlling the Water circulation in water tube boilers consisting in taking Water from a part of the boiler, 1n lncrea'smg the pressure of the water in stages, in forcing the water at the pressures corresponding to said different stages through various separate regions of the water tubes, in which the temperatures are different, to cause ditterent water velocities corresponding to the different temperatures in said regions and in controlling the pressure stages and the water velocities through the water tubes in accordance with the temperature of the fire gases.

llaA steam generator comprising water tubes divided into separate groups, and means including a pump having intake and discharge ports connected with said steam generator, for forcing water from a part of the generator with different pressure degrees and velocities through various groups of water tubes to correspond with different temperatures which exist in the .various groups.

12. A steam generator comprising water tubes divided into groups which are separated from each other at their Water entrance portions, and means including a pump having intake and outlet ports conneeted with said steam generator, for torcing water from a part of the generator vwith different pressure degrees and velocities through said various groups of water tubes to correspond with different temperatures which exist in the various groups.

13. A steam generator comprising water tubes divided into. groups which are separated from each other at their water en trance portions, a pump having different pressure stages, an intake connection leadingtrom the boiler to said pump, and connections leading from difi'erent pressure stages of saidpump to said separated water tube groups for directing water of different pressure degrees to pass therethrough at diiterent velocities to correspond with different temperatures which exist in the various groups.

141A steam generator comprising water tubes divided into groups which are separated froin each other at their water entrance portions, a pumphaving different pressure stages, an intake connection leading from the boiler to said pump, and connections leading from said pump to said separated water tube groups for forcing water of diiierent pressure degrees at different velocities therethrough, the higher pressure stage of said pump being connected with the water tube group situated in a combustion space of highest tempera-- ture and the lower pressure stages with the water tube groups situated in the furnace spaces with corresponding lower temperatures.

15. A steam generator comprising water tubes divided into groups which are separated trom each other at their water entrance portions, means for forcing water trom a part of the boiler with dlfierent pressure degrees and. velocities through said;

from a part of the boiler with difierent pressure degrees and velocities through said various groups of water tubes to correspond with different temperatures whlch exist in the various groups,,and means, including a a thermometric device, for controlling the pressure degrees of the water forcing means and the water velocities through the water tube groups in accordance with the temperature of the fire gases. i

In testimony whereof I afiix my signature.

FRANZ LCSEL. 

